JPWO2020045084A1 - Projection device and its control method - Google Patents

Abstract

Provided is a projection device capable of preventing dust from adhering to a member inside a housing and a control method thereof. The projector (100) is an intake fan that takes in air W1 from the intake port (10A) into the housing (10) during forward rotation and discharges air W2 in the housing (10) from the intake port (10A) during reverse rotation. (7) and a filter unit (70) provided at the intake port (10A) are provided. The filter unit (70) is composed of a plurality of filter units (71) arranged in the direction Y1. When the intake fan (7) rotates in the forward direction, the plurality of filter units (71) come into contact with each other to block the intake port (10A), and when the intake fan (7) rotates in the reverse direction, the plurality of filter units (7) are adjacent to each other. Are separated from each other to form a flow path through which air W2 is discharged in a gap between adjacent filter units (71).

Description

The present invention relates to a projection device and a control method thereof.

Since a projector as a projection device has a light source, a light modulation element that spatially modulates the light from the light source, and a member having a large temperature rise (hereinafter referred to as a cooled member) such as a power supply circuit, these cooled members are air-cooled. It is common to install a fan for cooling by.

Patent Document 1 describes a housing constituting an exterior, an opening installed in the housing, and through the opening, outside air is sucked into the housing by a forward rotation operation, and inside the housing by a reverse rotation operation. A projector is described that includes a fan that exhausts the air from the electronic device to the outside, and a filter that is arranged between the opening and the fan to prevent dust from entering the inside of the housing.

Patent Document 2 describes a projector including an exterior housing having an intake port for taking in external air, and a dustproof filter that covers the intake port and suppresses dust from entering the inside of the exterior housing. ing. In this projector, when the dustproof filter is clogged and sufficient intake air cannot be obtained, the dustproof filter moves to form a gap between the housing and the dustproof filter to secure the amount of intake air.

Patent Document 3 describes a projector having a lid for closing the intake port in order to prevent dust from entering the inside of the housing when the filter is replaced.

Patent Document 4 describes an opening formed in a housing, a wind guide plate provided in the opening and a variable opening state of the opening, and cooling air provided inside the housing. Described is an image projection device including a fan capable of varying the amount of air passing through the air, and a control means for controlling the opening state of the air guide plate so as to match the air volume of the fan when the device is operated.

Japanese Patent Application Laid-Open No. 2008-060108 Japanese Patent Application Laid-Open No. 2014-081651 Japanese Patent Application Laid-Open No. 2007-241002 Japanese Patent Application Laid-Open No. 2004-233396

The dust collecting filter provided facing the intake fan plays a role of preventing dust from the outside of the projector housing from entering the inside of the housing when the intake fan is rotated in the forward direction to take in air. .. On the other hand, as described in Patent Document 1, when the intake fan is rotated in the reverse direction, the wind pressure due to the reverse rotation makes it possible to remove the dust adhering to the filter. However, when the intake fan is rotated in the reverse direction, if dust is present inside the housing, the dust may adhere to the filter. Then, when the intake fan rotates in the forward direction, the dust returns to the inside of the housing. Therefore, there is a problem that it is difficult to remove the dust that has entered the inside of the housing. Patent Document 1 does not describe such a problem and a means for solving the problem. Patent Documents 2-4 do not assume that the intake fan is rotated in the reverse direction, and do not recognize the above-mentioned problems.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a projection device capable of preventing dust from adhering to a member inside a housing and a control method thereof.

The projection device of the present invention takes in air into the housing through the housing having an opening and the opening in the forward rotation state, and takes in the air in the housing in the reverse rotation state. A fan for discharging from the opening and a filter part for capturing dust contained in the air taken into the housing by the fan are provided, and the filter part has a direction of discharging air due to the reverse rotation of the fan. A plurality of filters arranged in the discharge direction and in the direction perpendicular to the rotation axis, which have a rotation axis extending in a vertical direction and a filter for capturing dust rotatably configured around the rotation axis. The plurality of filter units are composed of units, and in a state where the fan is rotating in the forward direction, adjacent filter units come into contact with each other to close the opening, and the fan is rotated in the reverse direction. In the above, the adjacent filter units are separated from each other, and a flow path through which the air in the housing is discharged is formed in the gap between the adjacent filter units.

The control method of the projection device of the present invention includes a housing having an opening, air is taken into the housing from the opening in a forward rotation state, and air is taken into the housing in a reverse rotation state. A control method for a projection device including a fan for discharging air from the opening and a filter unit for capturing dust contained in the air taken into the housing by the fan. The filter unit is a method for controlling the projection device. The discharge direction and the above, which have a rotation shaft extending in a direction perpendicular to the air discharge direction due to the reverse rotation of the fan, and a filter for capturing dust rotatably configured around the rotation shaft. It is composed of a plurality of filter units arranged in a direction perpendicular to the rotation axis, and in a state where the fan is rotating in the normal direction, the adjacent filter units are brought into contact with each other and the opening is closed by the plurality of filter units. When the fan is rotating in the reverse direction, the adjacent filter units are separated from each other to form a flow path through which the air in the housing is discharged in the gap between the adjacent filter units. is there.

According to the present invention, it is possible to provide a projection device capable of preventing dust from adhering to a member inside a housing and a control method thereof.

It is a schematic diagram which shows the schematic structure of the projector 100 which is one Embodiment of the projection apparatus of this invention. It is sectional drawing of the range A of FIG. 1 in the state which the intake fan 7 shown in FIG. 1 is rotating forward. It is sectional drawing of the range A of FIG. 1 in the state which the intake fan 7 shown in FIG. 1 is rotating in the reverse direction. It is sectional drawing which shows the modification of the range A of FIG. 1 in the state which the intake fan 7 shown in FIG. 1 is rotating forward. FIG. 5 is a schematic cross-sectional view showing a modified example of the range A of FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction. It is a schematic diagram which shows the schematic structure of the projector 100A which is the 1st modification of the projector 100 shown in FIG. It is sectional drawing which shows the modification of the range A of FIG. 1 in the state which the intake fan 7 shown in FIG. 1 is rotating forward. FIG. 5 is a schematic cross-sectional view showing a modified example of the range A of FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction. It is a schematic diagram which shows the schematic structure of the projector 100B which is the 2nd modification of the projector 100 shown in FIG. 9 is a schematic cross-sectional view of a range B of FIG. 9 in a state where the exhaust fan 8A shown in FIG. 9 is rotating in the reverse direction. 9 is a schematic cross-sectional view of a range B of FIG. 9 in a state where the exhaust fan 8A shown in FIG. 9 is rotating in the forward direction.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic view showing a schematic configuration of a projector 100, which is an embodiment of the projection device of the present invention. The projector 100 includes a housing 10 made of metal or resin, a light source unit 2, a light modulation element 3, a projection optical system 4, a system control unit 5, an intake fan 7, and an exhaust provided inside the housing 10. The fan 8 and the filter unit 70 provided in the intake port 10A formed in the housing 10 are provided.

The light source unit 2 includes a light source 21 that emits white light, a color wheel 22, and an illumination optical system 23. The light source 21 includes a light emitting element such as a laser or an LED (Light Emitting Diode). The color wheel 22 is arranged between the light source 21 and the illumination optical system 23. The color wheel 22 is a disk-shaped member, and an R filter that transmits red light, a G filter that transmits green light, and a B filter that transmits blue light are provided along the circumferential direction thereof. The color wheel 22 is rotated about an axis, and the white light emitted from the light source 21 is separated into red light, green light, and blue light in a time-divided manner and guided to the illumination optical system 23. The light emitted from the illumination optical system 23 is incident on the light modulation element 3.

The light modulation element 3 spatially modulates the light emitted from the illumination optical system 23 based on the image data, and emits the spatially modulated light to the projection optical system 4.

The projector 100 shown in FIG. 1 is an example in which a DMD (Digital Micromirror Device) is used as the light modulation element 3, and examples of the light modulation element 3 include LCOS (Liquid crystal on silicon) and MEMS (MicroElectromechanical Systems). ) Elements, liquid crystal display elements, and the like can also be used.

The projection optical system 4 receives light from the light modulation element 3 and includes at least one lens. The light that has passed through the projection optical system 4 is projected onto a screen (not shown) through an opening provided in the housing 10.

The intake fan 7 is provided at a position facing the intake port 10A formed by the opening formed in the housing 10. The intake fan 7 can switch its rotation direction forward and reverse. When the intake fan 7 is rotated in one direction (forward rotation), air is taken into the housing 10 from the intake port 10A, and the intake fan 7 is rotated in the opposite direction (reverse rotation) in this one direction. Discharges the air in the housing 10 from the intake port 10A.

The air taken into the housing 10 by the forward rotation of the intake fan 7 is blown onto, for example, a light source 21, a light modulation element 3, or a member to be cooled such as a power supply circuit (not shown) to cool them. .. The intake fan 7 is controlled by the system control unit 5. In the projector 100, the intake port 10A constitutes an opening, and the intake fan 7 constitutes a fan.

The filter unit 70 provided in the intake port 10A is provided to capture dust contained in the air taken into the housing 10 by the intake fan 7.

The exhaust fan 8 is provided at a position facing the exhaust port 10B formed by the opening formed in the housing 10, and exhausts the air in the housing 10 from the exhaust port 10B. The exhaust fan 8 is controlled by the system control unit 5. A filter (not shown) is fitted in the exhaust port 10B, and this filter prevents dust from entering the housing 10 from the exhaust port 10B.

The system control unit 5 controls the light source unit 2, the light modulation element 3, the intake fan 7, the exhaust fan 8, and the like, and includes a processor, a ROM (Read Only Memory), and a RAM. (Random Access Memory) and.

As a processor, a programmable logic device (programmable logic device) which is a processor whose circuit configuration can be changed after manufacturing such as a CPU (Central Processing Unit) which is a general-purpose processor which executes a program and performs various processes, and an FPGA (Field Programmable Gate Array). A dedicated electric circuit or the like, which is a processor having a circuit configuration specially designed for executing a specific process such as Programmable Logic Device (PLD) or ASIC (Application Special Integrated Circuit), and the like are included.

More specifically, the structure of these processors is an electric circuit in which circuit elements such as semiconductor elements are combined.

The processor of the system control unit 5 may be composed of one of the various processors described above, or a combination of two or more processors of the same type or different types (for example, a combination of a plurality of FPGAs or a combination of a CPU and an FPGA). It may be composed of a combination).

FIG. 2 is a schematic cross-sectional view of the range A of FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the forward direction. FIG. 3 is a schematic cross-sectional view of the range A of FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction.

The projector 100 is premised on being used in a posture in which the direction Y1 shown in FIGS. 2 and 3 is in the vertical direction. The direction Y2 shown in FIGS. 2 and 3 is the opposite direction to the vertical direction. The direction X2 shown in FIGS. 2 and 3 is the direction of sucking air into the housing 10 when the intake fan 7 is rotating in the forward direction. The direction X1 shown in FIGS. 2 and 3 is the direction of discharging air in the housing 10 in a state where the intake fan 7 is rotating in the reverse direction, and is the opposite direction of the direction X2. Direction Y1 and direction X1 are orthogonal to each other.

As shown in FIGS. 2 and 3, the filter unit 70 includes a plurality of filter units 71 (five in the examples of FIGS. 2 and 3). The filter unit 71 is provided by a rotating shaft 72 extending in a direction perpendicular to the direction X1 and the direction Y1 (direction from the front to the back of the paper in FIGS. 2 and 3) and a rotating shaft 72 rotatably about the rotating shaft 72. It is composed of, for example, a mesh-like and flat plate-like filter 73 for capturing dust, which is supported.

The five filter units 71 are arranged in the extending direction of the rotation shaft 72 and in the direction perpendicular to the direction X1, that is, in the direction Y1 or the direction Y2. The rotating shaft 72 is supported by a frame (not shown) fitted to the intake port 10A.

The position of the end (tip) of the filter unit 70 on each filter unit 71 opposite to the rotation axis 72 side in the direction X1 is from the position of the filter unit 70 in the direction X1 of the rotation axis 72 of each filter unit 71. Is also on the direction X1 side (right side in FIGS. 2 and 3).

The filter 73 in each filter unit 71 of the filter unit 70 is configured to come into contact with the rotation shaft 72 of the filter unit 71 adjacent to the direction Y1 side due to its own weight when the intake fan 7 is stopped. .. Further, the filter 73 in each filter unit 71 of the filter unit 70 has the wind pressure of the air W1 (see FIG. 2) sucked into the housing 10 by the intake fan 7 when the intake fan 7 is rotating in the forward direction. It is configured to come into contact with the rotation shaft 72 of the filter unit 71 adjacent to the direction Y1 side due to its own weight. As described above, in the state where the intake fan 7 is stopped and the state where the intake fan 7 is rotating in the forward direction, the filter unit 70 is configured to close the intake port 10A by the five filter units 71. ..

Further, in the state where the intake fan 7 is rotating in the reverse direction, the filter 73 in each filter unit 71 of the filter unit 70 is affected by the wind pressure of the air W2 (see FIG. 3) discharged to the outside of the housing 10 by the intake fan 7. , It is configured to be separated from the rotation shaft 72 of the filter unit 71 adjacent to the direction Y1. The amount of rotation of the filter 73 is limited so that the angle θ (see FIG. 3) formed by the surface of the housing 10 facing the inside and the direction Y1 is 90 degrees at the maximum. In the example of FIG. 3, the maximum value of the angle θ is set to less than 90 degrees (for example, 45 degrees).

As shown in FIG. 3, in the filter unit 70, when the intake fan 7 is rotating in the reverse direction, the five filter units 71 are separated from each other, and the air W2 is discharged into the gap between the adjacent filter units 71. It is configured to form a route to be processed.

In addition to the projection mode for projecting an image on the screen, the projector 100 is provided with a cleaning mode for removing dust captured by each filter 73 of the filter unit 70. This cleaning mode can be automatically started, for example, when the power of the projector 100 is turned off, or can be started manually.

The system control unit 5 rotates the intake fan 7 in the forward direction in the projection mode. In the state where the intake fan 7 is rotating in the forward direction, as shown in FIG. 2, the intake port 10A is blocked by the five filter units 71. Therefore, the dust contained in the air W1 sucked into the intake port 10A is captured by each filter 73 of the filter unit 70, and invasion into the inside of the housing 10 is prevented.

The system control unit 5 reversely rotates the intake fan 7 in the cleaning mode. In the state where the intake fan 7 is rotated in the reverse direction, as shown in FIG. 3, the filter 73 rotates in the direction X1 from the state shown in FIG. Then, the intake port 10A is partially opened by the gap between the adjacent filter units 71. Therefore, the air W2 inside the housing 10 passes through each filter 73 of the filter unit 70, and also passes through the flow path formed in the gap between the adjacent filter units 71. As a result, the dust trapped on the opposite surface of the filter 73 on the side facing the housing 10 is blown off in the direction X1 by the air W2 passing through the filter 73 and the above-mentioned flow path and removed.

Here, assuming that the air W2 contains dust, there is a possibility that the dust adheres to the surface of the filter 73 on the side facing the housing 10. However, when the air W2 flows along the above-mentioned flow path, the dust adhering to this surface is blown off in the direction X1 along this flow path and removed.

When a predetermined time has elapsed after starting the cleaning mode, the system control unit 5 stops the intake fan 7 and ends the cleaning mode. As a result, each filter 73 of the filter unit 70 rotates in the direction X2 from the state shown in FIG. 3 and returns to the state shown in FIG.

As described above, according to the projector 100, even if dust is present inside the housing 10 in the cleaning mode, the dust is trapped through the flow path formed in the gap between the filter units 71. It can be discharged to the outside of the body 10. Therefore, in the projection mode, the dust does not return to the inside of the housing 10, and it is possible to prevent the dust from adhering to the members inside the housing 10.

Further, according to the projector 100, in the state where the intake fan 7 is rotated in the reverse direction in the cleaning mode, each filter 73 of the filter unit 70 rotates toward the discharge direction of the air W2 by the intake fan 7 and described above. Form a flow path. Therefore, the outlet of the flow path formed in the gap between the filter units 71 can be formed on the outside of the intake port 10A, and the dust inside the housing 10 can be effectively removed. Further, according to this configuration, the filter 73 can be rotated only by the wind pressure generated by the rotation of the intake fan 7, and the projector 100 can be downsized and the manufacturing cost can be reduced.

Further, according to the projector 100, as shown in FIG. 3, when the intake fan 7 is rotated in the reverse direction, each filter 73 of the filter unit 70 is inclined with respect to the direction X1 which is the discharge direction of the air W2. It will be in the state of. As described above, the maximum value of the angle θ can be set to 90 degrees, but by setting this maximum value to less than 90 degrees, air is set to the surface of the filter 73 facing the inside of the housing 10. W2 can be sprayed strongly. Therefore, the dust inside the housing 10 can be effectively removed.

Further, since the maximum value of the angle θ is less than 90 degrees, the flow direction of the air W2 along the flow path formed in the gap between the filter units 71 can be brought closer to the vertical direction. Therefore, the synergistic effect of the wind pressure of the air W2 flowing through the flow path and the gravity acting on the dust can enhance the ability to remove the dust adhering to the surface of the filter 73 facing the inside of the housing 10.

In the projector 100, the rotating shaft 72 may be electrically driven by a driving unit such as a motor (not shown). In this case, this motor is controlled by the system control unit 5. Then, in the state of FIG. 2 in which the intake fan 7 is rotating in the forward direction, the system control unit 5 controls the motor to rotate the filter 73 to a position where the adjacent filter units 71 come into contact with each other. Further, in the state of FIG. 3 in which the intake fan 7 is rotating in the reverse direction, the system control unit 5 controls the motor to rotate the filter 73 to a position where the adjacent filter units 71 are separated from each other.

As described above, according to the configuration in which the rotary shaft 72 is electrically driven, the state in which the intake port 10A is closed and the state in which the intake port 10A is partially opened can be electrically switched. Therefore, for example, by closing the intake port 10A by motor control at the timing immediately after the intake fan 7 is stopped or immediately before the intake fan 7 is stopped, dust is strongly prevented from entering from the intake port 10A. be able to.

Further, in the configuration in which the rotating shaft 72 is driven by a motor, the filter 73 of the filter unit 71 is rotated in the direction X2 while the intake fan 7 is rotating in the reverse direction, and flows into the gap between the adjacent filter units 71. A configuration that forms a road can be adopted. This configuration will be described with reference to FIGS. 4 and 5.

FIG. 4 is a schematic cross-sectional view showing a modified example of the range A of FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the forward direction. FIG. 5 is a schematic cross-sectional view showing a modified example of the range A of FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction. FIG. 4 is the same as FIG. 2 except that the filter unit 70 is changed to the filter unit 70A. FIG. 5 is the same as FIG. 3 except that the filter unit 70 is changed to the filter unit 70A.

The filter unit 70A has a point where the tip of the filter 73 of the filter unit 71 is located on the direction X2 side of the rotating shaft 72, a point where the rotating shaft 72 of the filter unit 71 is driven by a motor, and an intake fan 7. In the state of FIG. 5 in which the intake fan 7 is rotated in the reverse direction, the filter 73 is rotated in the direction X2 to form a flow path in the gap between the filter units 71 with respect to the state of FIG. The point is different from the filter unit 70.

Even with the above configuration of the filter unit 70A, as shown in FIG. 5, in the cleaning mode, the filter 73 rotates toward the inside of the housing 10 and a flow path is formed in the gap between the filter units 71. Will be done. By flowing the air W2 along this flow path, the dust adhering to the filter 73 and the dust inside the housing 10 can be discharged to the outside of the housing 10.

FIG. 6 is a schematic view showing a schematic configuration of the projector 100A, which is a first modification of the projector 100 shown in FIG. The projector 100A has the same configuration as the projector 100 except that the exciting portion 74 is added.

The vibrating unit 74 is a device for vibrating the filter unit 70, and is configured to include, for example, an ultrasonic vibrator and a driving element for driving the ultrasonic vibrator. The excitation unit 74 is controlled by the system control unit 5. The system control unit 5 of the projector 100A operates the vibration excitation unit 74 to vibrate the filter unit 70 while the intake fan 7 is rotating in the reverse direction. The system control unit 5 of the projector 100A stops the vibration exciting unit 74 while the intake fan 7 is rotating or stopped in the forward direction.

According to the projector 100A, since the filter unit 70 vibrates in the state where the intake fan 7 is rotated in the reverse direction, it is possible to enhance the effect of removing the dust inside the housing 10 and the dust adhering to the filter 73.

FIG. 7 is a schematic cross-sectional view showing a modified example of the range A of FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the forward direction. FIG. 8 is a schematic cross-sectional view showing a modified example of the range A of FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction. FIG. 7 is the same as FIG. 2 except that the filter unit 70 is changed to the filter unit 70B. FIG. 8 is the same as FIG. 3 except that the filter unit 70 is changed to the filter unit 70B.

In the filter unit 70B shown in FIGS. 7 and 8, the position of the rotation shaft 72 in the filter unit 71 is different from that of the filter unit 70. The rotation axis 72 of the filter unit 71 in the filter unit 70B is located at the center of the filter 73. Even with such a filter unit 70B, it is possible to remove dust existing inside the housing 10 in the cleaning mode.

FIG. 9 is a schematic view showing a schematic configuration of the projector 100B, which is a second modification of the projector 100 shown in FIG. In the projector 100B, except that the exhaust fan 8 is changed to the exhaust fan 8A and the filter portion 70 having the same structure as that provided in the intake port 10A is also provided in the exhaust port 10B. It has the same configuration as the projector 100.

The exhaust fan 8A is provided at a position facing the exhaust port 10B. The exhaust fan 8A can switch its rotation direction forward and reverse. When the exhaust fan 8A is rotated in one direction (forward rotation), air is taken into the housing 10 from the exhaust port 10B, and the exhaust fan 8A is rotated in the opposite direction (reverse rotation) in this one direction. Discharges the air in the housing 10 from the exhaust port 10B.

In the projector 100B, the intake port 10A constitutes the first opening, and the exhaust port 10B constitutes the second opening. The filter unit 70 provided at the intake port 10A constitutes the first filter unit, and the filter unit 70 provided at the exhaust port 10B constitutes the second filter unit.

The system control unit 5 of the projector 100B rotates the exhaust fan 8A in the reverse direction in the projection mode, and rotates the exhaust fan 8A in the forward direction in the cleaning mode.

FIG. 10 is a schematic cross-sectional view of the range B of FIG. 9 in a state where the exhaust fan 8A shown in FIG. 9 is rotating in the reverse direction. FIG. 11 is a schematic cross-sectional view of the range B of FIG. 9 in a state where the exhaust fan 8A shown in FIG. 9 is rotating in the forward direction.

In the projection mode, in the projection mode, the intake fan 7 rotates in the forward direction, air W1 is taken into the housing 10 through the filter portion 70 provided at the intake port 10A, and the member to be cooled is cooled by the air W1. .. Further, in the projection mode, the exhaust fan 8A rotates in the reverse direction, and a flow path is formed between the filter units 71 in the filter portion 70 provided in the exhaust port 10B by the wind pressure from the exhaust fan 8A. Therefore, as shown in FIG. 10, the air W1 taken into the housing 10 by the forward rotation of the intake fan 7 has a flow path formed in the exhaust port 10B and a filter 73 provided in the exhaust port 10B. It passes through both and is discharged to the outside of the housing 10.

In the cleaning mode, the exhaust fan 8A rotates in the forward direction of the projector 100B, and the air W2 is taken into the housing 10 through the filter portion 70 provided in the exhaust port 10B. Further, in the cleaning mode, the intake fan 7 rotates in the reverse direction, and a flow path is formed between the filter units 71 in the filter portion 70 provided at the intake port 10A by the wind pressure from the intake fan 7. Therefore, as shown in FIG. 3, the air W2 taken into the housing 10 by the forward rotation of the exhaust fan 8A has a flow path formed in the intake port 10A and a filter 73 provided in the intake port 10A. It passes through both and is discharged to the outside of the housing 10.

In this way, by providing the filter unit 70 also in the exhaust port 10B, in the state where the intake fan 7 is rotating in the forward direction (the state in which the exhaust fan 8A is rotating in the reverse direction), the exhaust port 10B is rotated by the filter unit 70. Since it is partially opened, the air in the housing 10 can be smoothly discharged, and the dust adhering to the filter 73 of the filter unit 70 provided in the exhaust port 10B is blown to the outside to remove it. Can be done. Further, in the state where the intake fan 7 is rotating in the reverse direction (the state in which the exhaust fan 8A is rotating in the forward direction), the exhaust port 10B is blocked by the filter unit 70, so that the exhaust port 10B is moved into the housing 10. It is possible to prevent the intrusion of dust.

It is preferable that the projector 100B also be provided with a vibrating portion that vibrates the filter portion 70 provided at the exhaust port 10B. The system control unit 5 of the projector 100B may operate the vibration excitation unit to vibrate the filter unit 70 in the state shown in FIG. 10 in which the exhaust fan 8A is rotating in the reverse direction. As a result, dust adhering to the filter portion 70 provided in the exhaust port 10B can be effectively removed.

The projectors 100, 100A, and 100B described so far may be used in a posture in which the direction perpendicular to the direction X1 and the direction Y1 (for example, the direction from the front to the back of the paper in FIG. 2) is the vertical direction. Good. Even in such a usage mode, it is possible to remove the dust existing inside the housing 10 in the cleaning mode.

As described above, the following matters are disclosed in the present specification.

(1)
A housing with an opening and
A fan that takes in air into the housing from the opening in the forward rotation state and discharges air in the housing from the opening in the reverse rotation state.
A filter unit for capturing dust contained in the air taken into the housing by the fan is provided.
The filter unit includes a rotation shaft extending in a direction perpendicular to the air discharge direction due to the reverse rotation of the fan, and a filter for capturing dust rotatably configured around the rotation shaft. It is composed of a plurality of filter units arranged in the discharge direction and the direction perpendicular to the rotation axis.
The plurality of filter units are adjacent to each other when the fan is rotating in the forward direction, and the adjacent filter units are in contact with each other to close the opening, and when the fan is rotating in the reverse direction, the plurality of filter units are adjacent to each other. A projection device in which the filter units are separated from each other and a flow path through which air in the housing is discharged is formed in a gap between adjacent filter units.

(2)
(1) The projection device according to the above.
Each of the plurality of filter units is projected to form the flow path by rotating in the discharge direction from the position in which the fan is rotating in the forward direction when the fan is rotating in the reverse direction. apparatus.

(3)
The projection device according to (1) or (2).
A projection device in which the filters of the plurality of filter units are inclined with respect to the discharge direction in a state where the fan is rotated in the reverse direction.

(4)
The projection device according to any one of (1) to (3).
A drive unit for driving each of the plurality of filter units is provided.
The drive unit is a projection device that brings the adjacent filter units into contact with each other when the fan is rotating forward, and separates the adjacent filter units from each other when the fan is rotating in the reverse direction. ..

(5)
The projection device according to any one of (1) to (4).
The rotation axis is a projection device that extends in the vertical direction and in the direction perpendicular to the discharge direction.

(6)
The projection device according to any one of (1) to (5).
A projection device further including a vibrating unit that vibrates the filter unit when the fan is rotating in the reverse direction.

(7)
The projection device according to any one of (1) to (6).
The opening includes a first opening and a second opening.
The fan is an intake fan that is forward-rotated in the projection mode for projecting an image and reverse-rotated in the cleaning mode for removing dust. An intake fan that takes in air into the housing and discharges the air in the housing from the first opening in the reverse rotation state, and an exhaust that is reversely rotated in the projection mode and forwardly rotated in the cleaning mode. When the fan is rotating in the reverse direction, the air inside the housing is discharged from the second opening, and when the fan is rotating in the forward direction, the air is taken into the housing from the second opening. Including with fans
With the intake fan rotating in the forward direction, the first filter unit for capturing dust contained in the air taken into the housing from the first opening and the exhaust fan rotate in the forward direction. A projection device including the second filter unit for capturing dust contained in the air taken into the housing from the second opening in the state of being present.

(8)
A housing having an opening, and a fan that takes in air into the housing from the opening in a forward rotation state and discharges air in the housing from the opening in a reverse rotation state. A method for controlling a projection device having a filter unit for capturing dust contained in air taken into the housing by the fan.
The filter unit includes a rotation shaft extending in a direction perpendicular to the air discharge direction due to the reverse rotation of the fan, and a filter for capturing dust rotatably configured around the rotation shaft. It is composed of a plurality of filter units arranged in the discharge direction and the direction perpendicular to the rotation axis.
In the state where the fan is rotating in the forward direction, the adjacent filter units are brought into contact with each other to close the opening by the plurality of filter units, and in the state where the fan is rotating in the reverse direction, the adjacent filter units are adjacent to each other. A method for controlling a projection device in which filter units are separated from each other to form a flow path through which air in the housing is discharged in a gap between adjacent filter units.

(9)
(8) The method for controlling a projection device according to the above.
Projection to form the flow path by rotating each of the plurality of filter units from the position in the state where the fan is rotating in the forward direction toward the discharge direction when the fan is rotating in the reverse direction. How to control the device.

(10)
The method for controlling the projection device according to (8) or (9).
A method for controlling a projection device that controls each of the filters of the plurality of filter units in a state of being inclined with respect to the discharge direction when the fan is rotating in the reverse direction.

(11)
The method for controlling a projection device according to any one of (8) to (10).
A method for controlling a projection device further comprising a step of vibrating the filter unit in a state where the fan is rotating in the reverse direction.

Although various embodiments have been described above with reference to the drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood. Further, each component in the above-described embodiment may be arbitrarily combined as long as the gist of the invention is not deviated.

This application is based on a Japanese patent application filed on August 31, 2018 (Japanese Patent Application No. 2018-163212), the contents of which are incorporated herein by reference.

The present invention is highly convenient and effective when applied to a liquid crystal projector or the like.

100, 100A, 100B Projector 2 Light source unit 21 Light source 22 Color wheel 23 Illumination optical system 3 Light modulation element 4 Projection optical system 5 System control unit 7 Intake fan 70, 70A, 70B Filter unit 71 Filter unit 72 Rotating axis 73 Filter 74 Vibration part θ Angle W1, W2 Air 8, 8A Exhaust fan 10 Housing 10A Intake port 10B Exhaust port A, B range

Claims (11)

A housing with an opening and
A fan that takes in air into the housing from the opening in the forward rotation state and discharges air in the housing from the opening in the reverse rotation state.
A filter unit for capturing dust contained in the air taken into the housing by the fan is provided.
The filter unit includes a rotation shaft extending in a direction perpendicular to the air discharge direction due to the reverse rotation of the fan, and a filter for capturing dust rotatably configured around the rotation shaft. It is composed of a plurality of filter units arranged in the discharge direction and the direction perpendicular to the rotation axis.
The plurality of filter units are adjacent to each other when the fan is rotating in the forward direction, and the adjacent filter units are in contact with each other to close the opening, and when the fan is rotating in the reverse direction, the plurality of filter units are adjacent to each other. A projection device in which the filter units are separated from each other and a flow path through which air in the housing is discharged is formed in a gap between adjacent filter units. The projection device according to claim 1.
Each of the plurality of filter units is projected to form the flow path by rotating toward the discharge direction from the position where the fan is rotating in the forward direction when the fan is rotating in the reverse direction. apparatus. The projection device according to claim 1 or 2.
A projection device in which each of the filters of the plurality of filter units is inclined with respect to the discharge direction in a state where the fan is rotated in the reverse direction. The projection device according to any one of claims 1 to 3.
A drive unit for driving each of the plurality of filter units is provided.
The drive unit is a projection device that brings the adjacent filter units into contact with each other when the fan is rotating in the forward direction, and separates the adjacent filter units from each other in the state in which the fan is rotating in the reverse direction. .. The projection device according to any one of claims 1 to 4.
The rotation axis is a projection device that extends in the vertical direction and in the direction perpendicular to the discharge direction. The projection device according to any one of claims 1 to 5.
A projection device further including a vibrating portion that vibrates the filter portion in a state where the fan is rotated in the reverse direction. The projection device according to any one of claims 1 to 6.
The opening includes a first opening and a second opening.
The fan is an intake fan that is forward-rotated in the projection mode for projecting an image and reverse-rotated in the cleaning mode for removing dust, and is said to be from the first opening in the forward-rotating state. An intake fan that takes in air into the housing and discharges the air in the housing from the first opening in a reverse-rotated state, and an exhaust that is reverse-rotated in the projection mode and forward-rotated in the cleaning mode. When the fan is rotating in the reverse direction, the air inside the housing is discharged from the second opening, and when the fan is rotating in the forward direction, the air is taken into the housing from the second opening. Including with fans
With the intake fan rotating in the forward direction, the first filter unit for capturing dust contained in the air taken into the housing from the first opening and the exhaust fan rotate in the forward direction. A projection device including the second filter unit for capturing dust contained in the air taken into the housing from the second opening in the state of being present. A housing having an opening, and a fan that takes in air into the housing from the opening in a forward rotation state and discharges air in the housing from the opening in a reverse rotation state. A method for controlling a projection device, which comprises a filter unit for capturing dust contained in air taken into the housing by the fan.
The filter unit includes a rotation shaft extending in a direction perpendicular to the air discharge direction due to the reverse rotation of the fan, and a filter for capturing dust rotatably configured around the rotation shaft. It is composed of a plurality of filter units arranged in the discharge direction and the direction perpendicular to the rotation axis.
In the state where the fan is rotating in the forward direction, the adjacent filter units are brought into contact with each other to close the opening by the plurality of filter units, and in the state where the fan is rotating in the reverse direction, the adjacent filter units are adjacent to each other. A method for controlling a projection device in which filter units are separated from each other to form a flow path through which air in the housing is discharged in a gap between adjacent filter units. The method for controlling a projection device according to claim 8.
A projection in which each of the plurality of filter units is rotated in the discharge direction from a position in which the fan is rotating in the forward direction to form the flow path when the fan is rotating in the reverse direction. How to control the device. The method for controlling a projection device according to claim 8 or 9.
A method for controlling a projection device that controls each of the filters of the plurality of filter units in a state of being inclined with respect to the discharge direction when the fan is rotated in the reverse direction. The method for controlling a projection device according to any one of claims 8 to 10.
A method of controlling a projection device further comprising a step of vibrating the filter unit in a state where the fan is rotated in the reverse direction.

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